SKU: 94545722369

Seachem Matrix

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Description

Seachem MatrixSeachem Matrix Matrix is a high porosity bio media that provides efficient biofiltration for the removal of nitrogenous waste. Matrix is a porous inorganic solid about 10 mm in diameter. Each liter of Matrix provides as much surface (>~700 m2) as 170 liters of plastic balls! Plastic bio materials provide only external surface area, whereas Matrix provides both external and internal macroporous surface area. These macropores are ideally sized for the

Seachem Matrix

Matrix™ is a high porosity bio media that provides efficient biofiltration for the removal of nitrogenous waste. Matrix™ is a porous inorganic solid about 10 mm in diameter. Each liter of Matrix™ provides as much surface (>~700 m2) as 170 liters of plastic balls! Plastic bio-materials provide only external surface area, whereas Matrix™ provides both external and internal macroporous surface area. These macropores are ideally sized for the support of nitrifying and denitrifying bacteria. This allows Matrix™, unlike other forms of biomedia, to remove nitrate along with ammonia and nitrite, simultaneously and in the same filter.

Matrix™ is completely inert and will not breakdown. It need not be replaced. Since the majority of the bacteria are internal, Matrix™ may be rinsed when needed without damaging the filter. Matrix™ is compatible with all types of wet or wet-dry filters.

  • High capacity biofiltration
  • Controls ammonia, nitrite, and nitrate
  • Highly porous - enormous surface area (>~700 m2/L)
  • Supports aerobic and anaerobic bacteria species

Directions

Use 250 mL of Matrix™ for each 200 L (50 US gallons)** of water. Matrix™ may be placed in any kind of filter, and is particularly effective in a canister filter. Matrix™ is sufficiently large that no filter bag should be required for most applications. Matrix™ works well in drip tray systems, but you may find that the larger Pond Matrix™ is better suited for such applications. Use with Stability® to more rapidly establish the bio-filter.

**This dosage may differ from your packaging. Based on updated studies, we've found Matrix™ treats even more water than previously asserted.

A: We certainly understand why people look at Matrix™ and compare it to pumice; they are both porous stones. But remember, not every porous stone is the same. Matrix™ is a specific type chosen for its extremely high porosity, pore size, durability, and inert nature. When you buy Matrix™, you know what you are getting. It has been tested in the lab and in thousand of hobbyist's aquariums for more than a decade with excellent results. You aren't just purchasing the physical material when you buy a container of Matrix; you are purchasing the research which has sourced and tested this specific type of stone, and the assurance that it is safe for use in your aquarium.

A: Nothing’s wrong. The product is working just as it should. The removal of nitrates essentially comes down to one parameter: rate. The rate at which your tank is producing nitrates and the rate at which it can remove them. If you fill a bathtub with the spigot wide open and try to keep it from overflowing by draining it out of a straw, it won’t be long until it overflows. However, if you drain it at the same rate it fills, the level will always stay the same. Or, if it nearly fills up and then you drain it at a rate faster than it is filling, the level will drop. The same applies to nitrate removal. To lower nitrates you must equip your tank with the capacity to remove them at a rate greater than or equal to the rate of formation. So, if your nitrates are holding steady and you want them to come down, increase the amount of Matrix™ you are using or use de❊nitrate in addition to the Matrix™ (de❊nitrate will more efficiently remove nitrates per volume of product assuming a flow rate of not more than ~50 gallons/hour). If you need to use a higher flow rate, than stick with Matrix™ or try Pond Matrix™, both of which support anaerobic denitrification at higher flow rates.

A: Matrix™ is a biomedia, meaning it does not exhaust over time, so you should never need to replace it. That said it is possible for Matrix™ media to become clogged up with detritus and slime, so we recommend regular filter maintenance to ensure it continues working as efficiently as possible. The frequency with which a canister filter needs to be opened and cleaned out varies from tank to tank, but a good starting point is once a month.

A: We recommend that water flow through filter media in this order:
1. Mechanical filtration (filter floss, sponges, etc.)
2. Chemical filtration (MatrixCarbon, PhosGuard, Purigen, etc)
3. Biological filtration (Matrix)
Every filter is different, so the exact placement of Matrix™ will vary from brand to brand.  Consult your filter’s instruction manual to find the direction of flow for your filter.

A: This all depends on the stage of biological establishment of your tank, placement of Matrix™ and flow rate. Generally you will start to see improvement in a couple of weeks but every situation varies.

A: No, It is an inert media that will not directly impact your pH.

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SKU: 94545722369

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Austin & Cambria
Lowell, US
★★★★★ 5
That ending 😫
Format: Kindle
I fell into a false sense of security and really thought this was gearing towards a happy ending. Then I realized there’s no work they don’t punish Andrew. I really liked Vale’s character. I don’t normally read books with pregnancy but going into this knowing she was pregnant made it more enjoyable for me. I loved Bishops devotion to her and her happiness. I also loved that Holt and Mercy couldn’t fight their attraction to her. I love scent matches so very much. I’m so curious to see how this duet will end up. And I need to pay more attention and notice that a book I’m starting is a duet to begin with lol
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Reviewed in the United States on February 21, 2025
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Sarah A
Dallas, US
★★★★★ 5
oh wow
Format: Kindle
I just knew there was something about Cooper! I’m wondering if he’s about to be included but damn I’m glad he’s at least not a rapist and creepy guy, he just got called on assignment and had to go! This should be interesting! She’s gonna run and then what’s his face is gonna grab her. I’m worried! Wow that was a great book and cliffhanger! Loving this!
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Reviewed in the United States on December 27, 2025
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Ashley Morgan
Fort Morgan, US
★★★★★ 5
ABSOLUTELY A MUST for Omegaverse Girls!!!
I ABSOLUTELY LOVE Jillian West and her books!!! I’m so happy I already bought book two and now I have to buy the others for the Assurance Security series!! Not gonna lie Val kind of annoyed me at the beginning but she grew on me!! Her men are chef’s kisses!!! Holt annoys me some but I can let it slide. I already bought part two so I’m going to be reading that in between work phone calls!!!! DON’T TELL MY BOSS 😂😂😂😂
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Reviewed in the United States on September 30, 2025
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Carmen Alicea
Dallas, US
★★★★★ 4
Baby bumps and bodyguards
Format: Kindle
Dark, emotional, and unexpectedly tender, Not Ready is an omegaverse romance that delivers found family feels, fierce protectiveness, and a very pregnant heroine who refuses to break. Vale’s on the run from a stalker, but lands in the arms of three private security alphas, cue the swoony tension, fake marriage twist, and slow-burn heat. It’s a little gritty, a little soft, and a whole lot addictive. If you love protective alphas, high stakes, and heroines with quiet strength, this one’s a must-read.
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Reviewed in the United States on December 18, 2025
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Shianne Whipple
Massapequa, US
★★★★★ 5
Strong Omegaverse Comfort and a Attention Grabbing Plot
Format: Kindle
Jillian West never misses when it comes to Omegaverse, and Not Ready is no exception. This story was the perfect blend of cozy comfort and emotional depth while still delivering a strong plot. Vale is such a powerful heroine, she is strong, capable, and determined but I love that she still allows her pack to love and take care of her. It’s that balance of independence and vulnerability that makes her so relatable. The relationship dynamics were amazing: Bishop is steadfast and completely head over heels, Mercy is skeptical but protective in his own way, and Holt is the hesitant one whose slow fall is so satisfying to watch unfold. The romance hits that sweet spot between insta-love and cautious build, keeping me hooked the entire way through. And that ending. Oh my god, the cliffhanger! I need the next book in this duet immediately.
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Reviewed in the United States on August 28, 2025

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